package com.ruoyi.framework.aspectj;

import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.springframework.stereotype.Component;
import com.ruoyi.common.annotation.DataScope;
import com.ruoyi.common.core.domain.BaseEntity;
import com.ruoyi.common.core.domain.entity.SysRole;
import com.ruoyi.common.core.domain.entity.SysUser;
import com.ruoyi.common.core.domain.model.LoginUser;
import com.ruoyi.common.utils.StringUtils;
import com.ruoyi.common.utils.SecurityUtils;

/**
 * 数据过滤处理
 *
 * @author ruoyi
 */
@Aspect
@Component
public class DataScopeAspect {
    /**
     * 全部数据权限
     */
    public static final String DATA_SCOPE_ALL = "1";

    /**
     * 自定数据权限
     */
    public static final String DATA_SCOPE_CUSTOM = "2";

    /**
     * 部门数据权限
     */
    public static final String DATA_SCOPE_DEPT = "3";

    /**
     * 部门及以下数据权限
     */
    public static final String DATA_SCOPE_DEPT_AND_CHILD = "4";

    /**
     * 仅本人数据权限 （只能查到自己）
     */
    public static final String DATA_SCOPE_SELF = "5";

    /**
     * 数据权限过滤关键字
     */
    public static final String DATA_SCOPE = "dataScope";
    // 表示该切面将在被注解为 @DataScope 的方法执行之前执行
    @Before("@annotation(controllerDataScope)")
    public void doBefore(JoinPoint point, DataScope controllerDataScope) throws Throwable {
        System.out.println("获取@DataScope的参数值"+controllerDataScope.userAlias()+controllerDataScope.deptAlias());
        clearDataScope(point);
        handleDataScope(point, controllerDataScope);
    }

    protected void handleDataScope(final JoinPoint joinPoint, DataScope controllerDataScope) {
        // 获取当前的用户
        LoginUser loginUser = SecurityUtils.getLoginUser();
        if (StringUtils.isNotNull(loginUser)) {
            SysUser currentUser = loginUser.getUser();
            // admin 进不去 if
            System.out.println("!currentUser.isAdmin"+!currentUser.isAdmin());
            // 如果是超级管理员，则不过滤数据
            if (StringUtils.isNotNull(currentUser) && !currentUser.isAdmin()) {
                //切点 用户 别名
                dataScopeFilter(joinPoint, currentUser, controllerDataScope.deptAlias(), controllerDataScope.userAlias());
            }
        }
    }

    /**
     * 数据范围过滤
     *
     * @param joinPoint 切点
     * @param user      用户
     * @param userAlias 别名
     */
    public static void dataScopeFilter(JoinPoint joinPoint, SysUser user, String deptAlias, String userAlias) {
        StringBuilder sqlString = new StringBuilder();
        /* 获取 角色数据权限*/
        /* 多个角色 最终以 and or ... or...or 拼接*/
        for (SysRole role : user.getRoles()) {

            String dataScope = role.getDataScope();
            System.out.println("dataScope的值1-5："+dataScope);
            if (DATA_SCOPE_ALL.equals(dataScope)) {
                sqlString = new StringBuilder();
                break;
            } else if (DATA_SCOPE_CUSTOM.equals(dataScope)) {
                sqlString.append(StringUtils.format(" OR {}.dept_id IN ( SELECT dept_id FROM sys_role_dept WHERE role_id = {} ) ", deptAlias, role.getRoleId()));
            } else if (DATA_SCOPE_DEPT.equals(dataScope)) {
                sqlString.append(StringUtils.format(" OR {}.dept_id = {} ", deptAlias, user.getDeptId()));
            } else if (DATA_SCOPE_DEPT_AND_CHILD.equals(dataScope)) {
                sqlString.append(StringUtils.format(
                        " OR {}.dept_id IN ( SELECT dept_id FROM sys_dept WHERE dept_id = {} or find_in_set( {} , ancestors ) )",
                        deptAlias, user.getDeptId(), user.getDeptId()));
            } else if (DATA_SCOPE_SELF.equals(dataScope)) {
                if (StringUtils.isNotBlank(userAlias)) {
                    sqlString.append(StringUtils.format(" OR {}.user_id = {} ", userAlias, user.getUserId()));// {} 是占位符
                } else {
                    // 数据权限为仅本人且没有userAlias别名不查询任何数据  例如selectRoleList 此时仅本人权限的情况下查不到任何角色 部门
                    sqlString.append(StringUtils.format(" OR {}.dept_id = 0 ", deptAlias));
                }
            }
        }
        // 拼接最终sql
        if (StringUtils.isNotBlank(sqlString.toString())) {
            Object params = joinPoint.getArgs()[0];
            if (StringUtils.isNotNull(params) && params instanceof BaseEntity) {
                BaseEntity baseEntity = (BaseEntity) params;
                System.out.println("baseEntity.getParams"+baseEntity.getParams() );
                baseEntity.getParams().put(DATA_SCOPE, " AND (" + sqlString.substring(4) + ")");// 从第四个字符(包含空格)往后截取
                System.out.println("拼接的sql样子:"+baseEntity.getParams().get(DATA_SCOPE));
            }
        }
    }

    /**
     * 拼接权限sql前先清空params.dataScope参数防止注入 比如 params[dataScope] = 'or 1=1 '会查询出来全部数据
     */
    private void clearDataScope(final JoinPoint joinPoint) {

        Object params = joinPoint.getArgs()[0];// 传的什么对象 拿的就是什么对象 比如user对象
        System.out.println("params"+params);
        // 不为null
        if (StringUtils.isNotNull(params) && params instanceof BaseEntity) {
            BaseEntity baseEntity = (BaseEntity) params;
            System.out.println("重置DATA_SCOPE");

            baseEntity.getParams().put(DATA_SCOPE, "");
        }
    }
}
